Proceedings of second Pan American scientific congress : conservation of the oil and gas resources of the Americans / by Arnold, Ralph

The Great american forest / by Platt, Rutherford

Conserving american resources / by Parson, Ruben L.

American economic journal: economic policy.

Conserving american resources / by Parson, Ruben L.

Conserving american resources / by Parson, Ruben L.

The great american forest / by Platt, Rutherford

American Journal of Agricultural Economics.

Sólo desde máquinas con acceso a la Biblioteca del MINCyT:

American Journal of Agricultural Economics.

Natural resources in Latin American development / by Grunwald, Joseph, 1920-

Proceedings of second Pan American scientific congress : conservation and economic theory / by Ely, Richard T.

Proceedings of second Pan American scientific congress : the economic learing of future trading in agricultural commodities / by Emery, Henry C.

Proceedings of second Pan American scientific congress : conservation in its relation to industrial evolution / by Hess, Ralph Henry

Proceedings of second Pan American scientific congress : a forest policy for a nation / by Graves, Henry S.

Proceedings of second Pan American scientific congress : the people's interest in water-power resources / by Smith, George Otis

Proceedings of second Pan American scientific congress : relation of the government to the marketing problem / by Galloway, Beverly T.

Proceedings of second Pan American scientific congress : the conservation of human energy / by Carver, T. N.

Proceedings of second Pan American scientific congress : irrigation in the United States / by Fortier, Samuel

Proceedings of second Pan American scientific congress : the water requirement of plants as influenced by enviroment / by Briggs, Lyman J.

Proceedings of second Pan American scientific congress : relation between quantity of irrigation water used and quantity of crop produced / by Widtsoe, John A.